# Service bulletin IB26\-J\-001

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 11030902
- Published by NHTSA: 2026\-04\-07
- Manufacturer's number: IB26\-J\-001
- Manufacturer's date: 2026\-03\-26
- NHTSA component: ENGINE
- Manufacturer's system: ENGINE

## NHTSA's summary

INFORMATION BULLETIN \- SOME CUSTOMERS MAY COMPLAIN OF ENGINE OVERHEATING, VIBRATION AND A CHECK ENGINE MALFUNCTION INDICATOR LAMP \(MIL\). DEALERS MAY FIND THAT THE ELECTRO\-VISCOUS FAN CLUTCH HAS FAILED, THE WIRING HAS BROKEN NEAR THE FAN CONNECTOR FROM VIBRATION, OR THE FAN MAY APPEAR TO BE WOBBLY AND/OR OUT OF ROUND. THESE CONDITIONS MAY BE PRESENT IF THE FAN CLUTCH ADAPTER WAS INSTALLED OFF\-CENTER. IF ANY OF THE ABOVE CONDITIONS ARE FOUND OR THE FAN CLUTCH IS REPLACED, ISUZU RECOMMENDS UPDATING THE FAN CLUTCH ADAPTER AT THE SAME TIME. THE NEW ADAPTER HAS BEEN IMPROVED SO THAT IT IS ALWAYS CENTERED ON THE CRANK PULLEY. FOLLOW THE APPROPRIATE SERVICE INFORMATION FOR REPLACEMENT INSTRUCTIONS. THE ADAPTER SHOULD ONLY NEED TO BE UPDATED ONE TIME.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11030902-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11030902-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine

## Vehicles listed

- 2022 to 2025 ISUZU F\-SERIES

JSON: [/v1/bulletins/11030902](/v1/bulletins/11030902)

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